PLATE VIII. Fig. 4.
_Boisd. Spec. gen._ p. 655. Pl. iii. C, fig. 1.
This insect was discovered not long since in Mexico, and is considered
rare. The colour of the surface is very bright citron-yellow, the
upper wings with a broad black border externally, which ends in a
quadrangular expansion a little before the middle of the internal
margin. The under wings have the outer border prolonged into an acute
angle, forming a kind of rudimentary tail, and the anterior half is
widely bordered with black. The primary wings are pale citron-yellow on
the under side, with a central black point, and have the outer border
near the fringe tinged with red; the secondary pair yellow, speckled
with ferruginous particles, and having a black point in the centre, the
extreme angle marked with a ferruginous spot, and the posterior half
with four or five other spots of the same colour, having sometimes a
tendency to form an irregular transverse band. The above description
applies to the male; the female has the surface of the wings
whitish-yellow, with the black border broader, and the anterior margin
of the secondary wings widely orange-yellow. The expansion varies from
twenty to twenty three lines.